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Configuration file format and content
A configuration file is saved as a text file; the following rules apply:
• Only non-default configuration settings are saved.
• Commands in a configuration file are listed in sections by views, usually in the order of system view,
interface view, routing protocol view, and user interface view. Sections are separated with one or
multiple blank lines or comment lines that start with a pound sign #.
• A configuration file ends with a return.
Coexistence of multiple configuration files
The device can save multiple configuration files on its storage media. Save the configurations used in
different networking environments as different configuration files. When the device moves between
networking environments, specify the configuration file as the startup configuration file to be used at the next
startup of the device and then restart the device. Multiple configuration files allow the device to adapt to a
network rapidly, saving the configuration workload.
A device starts up using only one configuration file. However, specify two startup configuration files, main
startup configuration file and backup startup configuration file to be used at the next startup of the device as
needed when the device has main and backup configuration files. The device starts up using the main startup
configuration file. If the main startup configuration file is corrupted or lost, the devices starts up using the
backup startup configuration file. Devices supporting main and backup startup configuration files are more
secure and reliable.
At a moment, the switch has at most one main startup configuration file and one backup startup configuration
file. Specify neither of the two files (displayed as NULL).
Specify main and backup startup configuration files to be used at the next startup of the device using one of
the following methods:
• Specify them when saving the running configuration. For more information, see Saving the running
c
o
nfiguration.
• Specify them when specifying the startup configuration file to be used at the next system startup. For
more information, see
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